feat: move timestamp below title in NoteList items

Title now takes full width on top, with timestamp displayed below
in 10px muted text, followed by the snippet. Applies to both flat
list and context view items.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/components/NoteList.tsx

@@ -289,16 +289,16 @@ function NoteListInner({ entries, selection, selectedNote, allContent, modifiedF
           style={{ color: typeColor }}
           data-testid="type-icon"
         />
-        <div className="flex items-baseline justify-between gap-2 pr-5">
+        <div className="pr-5">
           <div className={cn(
-            "min-w-0 flex-1 truncate text-[13px] text-foreground",
+            "truncate text-[13px] text-foreground",
             isSelected ? "font-semibold" : "font-medium"
           )}>
-            <span className="truncate">{entry.title}</span>
+            {entry.title}
           </div>
-          <span className="shrink-0 whitespace-nowrap text-[11px] text-muted-foreground">
+          <div className="text-[10px] text-muted-foreground">
             {relativeDate(getDisplayDate(entry))}
-          </span>
+          </div>
         </div>
         <div className="mt-0.5 text-[12px] leading-[1.5] text-muted-foreground" style={{ display: '-webkit-box', WebkitLineClamp: 2, WebkitBoxOrient: 'vertical', overflow: 'hidden' }}>
           {entry.snippet}